There are two free versions that I am aware of, the original one on WordPress.org repository:
And my free fork for ClassicPress:
The current versions numbers of each are not matching the version you have. These are 10.43 and 11.9 respectively, not 11.2.
The only Subscribe2 on the ClassicPress directory is the same code as my fork, and version 11.9.
Can you clarify which of these you are using or have you obtained from elsewhere?